Hydraulically controlled plow



Aug. 19, 1941. P. M. LUND v HYDRAULICALLY CONTROLLED PLOW Filed May 9, 1940 2 Sheets-Sheet 1 A iiorney Aug. 19,1941. P. M. LUND' HYDRAULICALLY CONTROLLED PLOW Filed May 9, 1940 2 Sheets-Sheet 2 I In ventor fafia/yasazg 217262 C By A iiomey Patented Aug. 19, 1941 UNITED STATES PATENT t'FlQE 4 Claims.

This invention appertains to new and useful improvements in controls for plows and more particularly to a hydraulic control.

The principal object of the present invention is to provide a cultivator including a plow which can be adjusted horizontally, to the end, that it can be moved in and out between trees in a row, such as when cultivating orchards.

Other objects and advantages of the invention will become apparent to the reader of the following specification.

In the drawings- Figure 1 represents a top plan view of the apparatus, the tractor being partly shown in broken lines.

Figure 2 is a side elevation-a1 view of the cultivator.

Figure 3 is a section on the line 33 of Figure 1.

Figure 4 is a sectional view on the line 4-4 of Figure 1.

Figure 5 is a section on the line 55 of Figure 2.

Referring to the drawings wherein like numerals designate like parts, it can be seen that numeral 5 generally refers to a tractor, shown in broken lines. The cultivator is generally referred to by numeral 6 and consists of the horizontally disposed L-shaped frame 1 consisting of the rear portion a and the side portion 22 hinged to the rear portion a as at T. An ear 8 is hinged as at 8' to the frame of the tractor 5. A carrier wheel 10 is provided for the hinged side portion b.

A substantially V-shaped bracket 9 having the diagonal brace IB is attached to the forward portion of the side of the frame I and has one end of the bar H pivotally connected thereto as at I 2. This bar I I is provided with the downwardly curved forward portion 0 to which the forward plow I3 is attached.

A universal coupling id is provided between the curved portion 0 of the bar H and the forward end of the elongated curved bar I5 of the rear plow or shovel It. A hydraulic cylinder l1 having an apertured ear 18 at one end, is secured by thisear and a bolt It to the rear portion a of the frame I.

A piston 20 is operative in the cylinder I1 and a connecting rod 2| extends from this piston and is pivotally connected at its outer end as at 22, to the arm [5 of the rear plow l6.

Nipples 23 and 24 project from opposite end portions of the cylinder I! and to these connect the fluid pressure tubes 25 and 26, respectively. These tubes extend to the control valve 21 which has a control lever 28.

The compressing circuit consists of the pump or compressor 29, the storage tank 38 and the pipes 35, 32 and 33 which extend from the tank 3% to the valve 21, from the valve 21 to the pump 29 and from the pump 29 to the tank 3|].

Thus it can be seen that by operating the lever the piston and connecting rod 2| can be moved outwardly or inwardly and accordingly the rear plow [6 will be adjusted laterally to the desired extent.

To permit raising and lowering of the plows, a frame structure 34 supporting the rack 35 is used in conjunction with a. hand lever 36 having a detent 37. This detent is controlled by the hand lever 38 and is operative against the teeth of the rack 35. A substantially S-shaped arm 39 extends from the lower end of the hand lever 36 and has the end portion cl extending through an opening 46 in the bar II. The outer end of the arm 39 is threaded to accommodate th nut 4|.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resortedto without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the invention, what is claimed as new is:

1. A cultivator comprising a frame, a forward plow on the frame, a rearward plow on the frame, and hydraulic means for laterally adjusting the rearwardly disposed plow, said forward plow being provided with [a plow beam, said rearward plow being provided with a plow beam and a universal connection between the beams.

2. A cultivator comprising a frame, a pair of interconnected plows at one side of the frame, one plow being located in front of the other and hydraulic control means for the rearmost plow.

3. A cultivator comprising a frame including a side member, an arm on the side member, a plow having a beam, said beam being pivotally connected to'the arm, a second plow located rearwardly of the first-mentioned plow and having a beam, said second-mentioned beam being pivotally connected at its forward end to the rear portion of the first-mentioned beam, elevating and lowering means for the first-mentioned beam and hydraulic control means for the secondmentioned beam.

4. A cultivator comprising a frame, a pair of alined plows at one side of the frame, one plow beinglooated in advance of the other, hydraulic control means for the rearmost plow, and a universal connection between the said plows.

PERLE MASON LUND. 

